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Texas Instruments SN74LVC1G19DCKRG4
- Part No.:
- SN74LVC1G19DCKRG4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
SN74LVC1G19DCKRG4.pdf
- Description:
- IC DECODER/DEMUX 1X1:2 SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,434
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Product details
Overview
SN74LVC1G19DCKRG4 from Texas Instruments is a 1-of-2 decoder/demultiplexer in SC70-6 package, operating from 1.65 V to 5.5 V VCC, with 4 ns max propagation delay at 3.3 V, ±24 mA output drive, and Ioff support for live insertion and partial-power-down mode. It routes a single address bit (A) to one of two active-low outputs (Y0/Y1) under low-active enable (E), used in portable audio docks and SSD power sequencing.
For engineers reviewing the SN74LVC1G19DCKRG4 datasheet, SN74LVC1G19DCKRG4 pinout, SN74LVC1G19DCKRG4 application, or SN74LVC1G19DCKRG4 equivalent, key selection criteria include its 1.65–5.5 V supply range, 6-pin SC70 footprint, Ioff-enabled back-drive protection, and 24 mA drive capability at 3.3 V for driving multiple logic loads in space-constrained consumer electronics.
Technical Context
This device implements a combinational 1-bit address decoder with active-low enable: when E = L, Y0 = L if A = L and Y1 = L if A = H; when E = H, both outputs remain high. Its CMOS design ensures rail-to-rail input tolerance up to 5.5 V independent of VCC, enabling mixed-voltage interfacing.
The Ioff circuitry actively disables outputs during power-off, blocking current flow between powered and unpowered sections-critical for hot-swap and partial-power-down systems. Output ground bounce (VOLP < 0.8 V) and VOH undershoot (VOHV > 2 V) are characterized at 3.3 V, TA = 25°C, supporting signal integrity in fast-switching applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 5.5 V - supports single-supply operation across 1.8 V, 2.5 V, 3.3 V, and 5 V logic domains |
| tpd (max) | 4 ns at VCC = 3.3 V, CL = 15 pF - enables timing-critical routing in portable audio and SSD control paths |
| IOL / IOH | ±24 mA at VCC = 3.3 V - drives multiple 74LVC inputs or LED indicators without external buffers |
| Ioff Current | ±10 µA max - prevents damaging back-current during live insertion or system sleep states |
| Input Voltage Tolerance | Up to 5.5 V - allows interfacing with 5 V controllers while powered from 1.8 V or 3.3 V rails |
| ICC (max) | 10 µA - minimizes quiescent power in always-on subsystems like USB-C PD state machines |
Pinout & Package
SN74LVC1G19DCKRG4 uses the SC70-6 (DCK) package: 2.0 mm × 1.25 mm body, 0.65 mm pitch, 6-pin surface-mount outline optimized for high-density portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - A | Address input | Selects Y0 (A = L) or Y1 (A = H) when E is asserted low |
| 2 - GND | Ground reference | Return path for all internal logic and output currents; must be low-impedance |
| 3 - E | Enable input (active low) | Disables decoding when high; both outputs float high (weak pull-up not present) |
| 4 - Y1 | Output 1 | Active-low output driven low only when E = L and A = H |
| 5 - VCC | Power supply | Supplies core logic and output drivers; requires local 0.1 µF bypass capacitor |
| 6 - Y0 | Output 0 | Active-low output driven low only when E = L and A = L |
Key Features
| Feature | Design Value |
|---|---|
| NanoFree™ SC70 package | Die-as-package construction reduces footprint to 2.0 mm × 1.25 mm - ideal for ultra-thin tablets and wireless headsets |
| Ioff support | Enables safe live insertion and partial-power-down by isolating outputs when VCC = 0 V |
| 5.5 V-tolerant inputs | Accepts 5 V signals while operating from 1.65 V VCC - eliminates level shifters in mixed-voltage I²C or GPIO expansion |
| Low ICC (10 µA max) | Reduces standby power in battery-powered PDA and MP3 recorder power management circuits |
| High drive (±24 mA) | Drives 10+ LVC inputs or small LEDs directly - avoids discrete buffer stages in audio dock status indicators |
Applications
| AV Receivers | SSDs: Client and Enterprise |
|---|---|
|
Use Scenario: Signal routing for HDMI CEC or IR receiver logic in compact AV receivers. IC Role / Device Role: Decoder selects between two control paths (e.g., main processor vs. standby microcontroller) based on system power state. Use Value: Ioff prevents back-drive from powered HDMI PHY into unpowered standby domain during soft power-off sequences. |
Use Scenario: Enabling discrete voltage rails (e.g., +1.2 V VDDQ and +3.3 V VCC) in NVMe SSDs during power-up/down sequencing. IC Role / Device Role: Demultiplexer controls dual PMIC enable lines using a single host GPIO and power-state signal. Use Value: 4 ns tpd ensures tight timing alignment between rail enables, meeting JEDEC SSD power sequencing windows. |
| Wireless Headsets | MP3 Players/Recorders |
|
Use Scenario: Routing microphone bias or codec clock select in Bluetooth headset PCBs with strict area constraints. IC Role / Device Role: 1-of-2 demux switches between primary and backup audio paths based on button press or firmware command. Use Value: SC70-6 footprint (2.0 mm × 1.25 mm) saves >40% board area versus SOT-23, critical for earbud PCB real estate. |
Use Scenario: Controlling LCD backlight dimming and SD card interface power in portable MP3 players. IC Role / Device Role: Decoder activates either display driver enable or memory controller power gate using shared system GPIO. Use Value: 5.5 V-tolerant inputs allow direct connection to 5 V USB charging detection logic without level translation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 1-of-2 decoder/demultiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC1G19GW,125 (Nexperia) |
SC70-6 package, same 1.65–5.5 V range, but tpd = 5.5 ns (vs. 4 ns) at 3.3 V; Ioff = ±20 µA (vs. ±10 µA) | Slightly higher propagation delay limits use in sub-250 MHz clock distribution; higher Ioff acceptable in non-hot-swap systems | Preferred where Nexperia supply chain alignment or AEC-Q200 qualification is required; verify layout for VOLP margin |
| MC74VHC1G19DTT1G (onsemi) |
TSOP-6 package (3.0 mm × 1.6 mm), 2–5.5 V range, tpd = 7.5 ns at 3.3 V; no Ioff support | Larger footprint and no power-down isolation - unsuitable for live-insertion SSD modules or USB-C accessories | Only suitable for cost-sensitive, non-power-gated applications where SC70 size is not mandatory |
Compared with 74LVC1G19GW,125 and MC74VHC1G19DTT1G, SN74LVC1G19DCKRG4 delivers the fastest propagation delay (4 ns), lowest Ioff leakage (±10 µA), and smallest SC70 footprint - making it optimal for high-density, low-power, hot-pluggable designs in portable audio and storage.
Availability
SN74LVC1G19DCKRG4 is available at Aetrix Electronics and suitable for AV receivers, SSD power sequencing, wireless headsets, and MP3 player subsystems requiring stable component supply, long-term lifecycle support, and RoHS-compliant SC70 packaging.
Supply support for SN74LVC1G19DCKRG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with over 50 years of innovation in high-reliability, low-power IC design.
SN74LVC1G19DCKRG4 belongs to TI's LVC logic family - engineered for low-voltage, high-speed operation in portable and battery-powered electronics where space, power, and mixed-voltage interoperability are critical.
FAQ
What is the maximum propagation delay of SN74LVC1G19DCKRG4 at 3.3 V?
The maximum propagation delay (tpd) of SN74LVC1G19DCKRG4 is 4 ns at VCC = 3.3 V with CL = 15 pF, as specified in the switching characteristics table of the SCES464G datasheet. This value applies to transitions at both A→Y0/Y1 and E→Y0/Y1 paths under recommended operating conditions and is measured with 0.3 V logic thresholds.
Does SN74LVC1G19DCKRG4 support 5 V input signals while operating from a 1.8 V supply?
Yes, SN74LVC1G19DCKRG4 supports input voltages up to 5.5 V regardless of VCC level - including when powered from 1.8 V. This overvoltage tolerance allows direct interfacing with 5 V microcontrollers or legacy peripherals without external level shifters, as confirmed in the Recommended Operating Conditions table.
How does the Ioff feature function in SN74LVC1G19DCKRG4 during power-down?
In SN74LVC1G19DCKRG4, the Ioff circuitry disables all outputs when VCC = 0 V, limiting leakage current to ±10 µA maximum. This prevents back-driving current from powered system buses into the unpowered IC - essential for safe live insertion in SSD modules and USB-C accessories where partial power-down is routine.
What is the recommended bypass capacitor for SN74LVC1G19DCKRG4?
A 0.1 µF ceramic capacitor is recommended between VCC (Pin 5) and GND (Pin 2) of SN74LVC1G19DCKRG4, placed as close as possible to the pins. This minimizes power supply noise and stabilizes switching transients, especially critical given its ±24 mA drive strength and 4 ns propagation delay.
Can SN74LVC1G19DCKRG4 drive multiple LVC-series logic inputs directly?
Yes, SN74LVC1G19DCKRG4 can drive at least 10 standard 74LVC inputs directly: its ±24 mA output drive at 3.3 V exceeds the ±2.4 mA per input required for LVC fanout, and its VOL/VOH specifications ensure valid logic levels across full temperature and voltage ranges per the Electrical Characteristics table.
SN74LVC1G19DCKRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Decoder/Demultiplexer
- Circuit:
- 1 x 1:2
- Independent Circuits:
- 1
- Current - Output High, Low:
- 32mA, 32mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 1.65V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-6
SN74LVC1G19DCKRG4 FAQ
1.How can I place an order for SN74LVC1G19DCKRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC1G19DCKRG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74LVC1G19DCKRG4 reliable?
The price and inventory of SN74LVC1G19DCKRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC1G19DCKRG4 is usually 5 days.
3.What payment methods are accepted for SN74LVC1G19DCKRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC1G19DCKRG4 transactions.
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4.How is shipping managed for SN74LVC1G19DCKRG4?
SN74LVC1G19DCKRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC1G19DCKRG4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74LVC1G19DCKRG4?
For technical support, including SN74LVC1G19DCKRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC1G19DCKRG4 requirements.
6.How does Aetrix verify that SN74LVC1G19DCKRG4 is sourced from the original manufacturer or authorized distributors?
All SN74LVC1G19DCKRG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74LVC1G19DCKRG4 meets industry standards.
7.What is the process for return or replacement of SN74LVC1G19DCKRG4?
All SN74LVC1G19DCKRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC1G19DCKRG4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74LVC1G19DCKRG4 part is unused and in its original packaging.
Return procedure for SN74LVC1G19DCKRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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